Bruce Murray Space Image LibrarySouth Polar Monitor - Viking 2 South Polar Monitor - Viking 2 Viking Orbiter 2 image of the southern polar plains and polar ice cap, taken as part of a regular climate monitoring program. This image was taken late in the southern summer, when the polar cap had reached its minimum extent for the year. A faint veil of water ice clouds is visible in the lower right corner over the southern polar icecap. This image was taken by Viking 2 on August 11, 1977, during Viking Orbiter 2's 356th orbit of Mars. NASA / JPL / USGS / Justin CowartOriginal image in PNG format here.